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CMDB tables

The Base Configuration Item [cmdb] table, which is the core CMDB table for non IT CIs
(descending classes are non IT CIs).

The core Configuration Item [cmdb_ci] table, which stores the basic attributes of all
the CIs. The admin, itil, or asset user role is required to access this table (descending
classes are IT CIs).

The CI Relationship [cmdb_rel_ci] table, which defines all relationships between
CIs.

The Configuration Item table is extended to other tables, such as Database
[cmdb_ci_database] and Computer [cmdb_ci_computer]. The Computer table is extended to the
Server [cmdb_ci_server] table, which is extended to the UNIX Server [cmdb_ci_unix_server]
table, and so on.

You can use the schema map to view more details of tables and their relationships:

Navigate to System Definition > Tables & Columns.

Select a table and click Schema Map.

Figure 1. Schema Map

Note: CIs not extended from the Configuration Item [cmdb_ci] table, are not displayed in
Dependency Views maps and in CI relation formatters.